Paper box machine



Nov. 11, 1941. E. ca. STAUDE 2,262,303

PAPER BOXMAGHINE F iled Sept. 7, 1939 4 Sheets-Sheet l INVENTOR Nov. 11, 1941.

E. G. STAUDE PAPER BOX MACHINE Filed Sept. r, 1939 4 Sheets-Sheet 2 Nov. 11, 1941. E. G. STAUDE 2,252,303

PAPER BOX MACHINE Filed Sept. 7, 1939 4 Sheets-Sheet 5 INVENTOR Nov. 11, 1941. E. G. STAUDE 2,262,303

PAPER BOX MACHINE .Filed Sept. '7, 1939 4 Sheets-Sheet 4 Patented Nov. 11, 1941 Y PAPER BOX MACHINE.

Edwin G. Staude, Minneapolis, Minn, aslignor to E. G. Staude Manufacturing Company, St. .Paul, Minn, a corporation of Minnesota Application September 7, 1939, Serial hi0. 293,744

13 Claims.

- This invention consists of improvements in the.

type of paper box making machines wherein box blanks are cut from a roll of paper stock and simultaneously creased, the waste automatically removed, and then conveyed through a gluing and folding mechanism where the boxes are completed.

My invention is especially adaptable to a box making machine in which the paper stock is cut and creased with respect to the longitudinally disposed fibre or grain" of the material, to fold the long vertical corner creases of the box across the fibre of said material so that when glued and folded it will considerably strengthen said box.

The principal object of my invention is therefore an improvement over my previous United States Patent #730,410 on Pasting and folding machine issued June 9, 190a, and United States Patent #1,179,573 on Envelope making machines, which was issued to me April 18, 1916, so as to make the right angle transfer section of that envelope machine more suitable for highspeed paper box making machines.

I have found that envelopeblanks are pliable and readily adapt themselves to a curved position when passing under the hold-down guides on the traveling apron, whereas the box blanks are still and extend farther away from the carrier chains when delivered out of the feeding mechanism and will not always drop into place fast enough to be caught by the. lugs on the chains which move the blanks at right angle.

In my Patent #730,410, I used a reciprocating member which was intended to hammer the blank down into position. The best speed I could obtain by this construction was 70 boxes per minute, with such a terrific waste that the machine enjoyed only a limited commercial suc-.

cess. I now find it possible to so improve the right angle transfer section to permit a speed, of at least 350 boxes per minute, with very little if any waste.

I therefore provide a revolving shaft in timed relationship to the incoming blank, which shaft is provided with one or more cam-shaped members that permit the box blank to enter the transfer section and at the proper time force the blank into definite position in front of the lugs on the transfer chains.

A further object of my invention is to provide a paper box making machine wherein an improved box blank conveying mechanism will insure a .more accurate positioning of the blanks at the point where said blanks are transferred 23.

from a longitudinal conveyor to a transverse conveyor.

A still further object of my invention is to increase the production capacity of such box making machine by providing a more positive and consequently more rapid blank locating means at the point of intersection of said conveyors.

The objects and features of my invention will appear from the following description and drawlugs, and are specified in the annexed claims.

In the drawings:

Figure 1 is a'plan view of a boxmaking machine in which my invention is incorporated.

Figure 2 is a vertical section on the line 2-4 of Figure 1. I

Figure 3 is a vertical cross-section on line 3-3 of Figure 2.

Figure 4 is an enlarged plan view of the upper left corner of Figure 1, which shows my improved positioning mechanism locating a box blank on the transverse conveyor.

Figures 5, 6 and '1 are vertical sections taken on line 5-5 of Figure 4, and clearly show several positions of the improved mechanism as the conveyor.

Figure 8 is a diagrammatic plan view illus- 1 trating how the box blanks are simultaneously cut and creased from a roll of paper stock and then separated as they are conveyed through the machine. I

In the drawings, numerals 8 indicate the frame members of a box blank making machine on which a roll of paper stock III is supported by an arbor ii. The paper ID, from the roll, is passed between feed rolls I! to a pair of cutting and creasing rolls l3 where the box blanks are cut to size and creased as desired. The blanks II are then passed through a pair of friction rolls M which deliver them at increased speed to a special delivery device which in turn speeds the travel of the blanks to separate them, as shown in Figure 8. This specialdelivery device consists of two pairs of comparatively short endless belts l5-l5- and Ii-ii between which the blanks iii are fed from the friction rolls ll. The lower belts li-II pass around a driven shaft II to idler pulleys I! at the outer ends of horizontal arms 19 which are adjustably'secured at their inner ends on a fixed cross-bar 20. The

upper belts lB-li pass around a driven shaft 2| to idler pulleys 22, which are located above the idler pulleys It, on the outer ends of arms The arms 23 are hinged at their inner ends on a cross-shaft 24 and are adapted to cause the.

the same direction as said blanks while Figure 4, I provide a series of hates in a recess lower runs-of the top belts to press against the upper runs of the lower belts with a yielding pressure, due to the weight of the arms 23 and the mechanism carried thereon. 'The downward movement of the arms 23 may be regulated by stop screws 25. This special delivery mechanism is adjusted to direct the, forward edges: of the box blanks a considerable distance over onto a comparatively wide conveyor apron 261 which travels at approximately the same speed and in passing over rolls 21 and 28 which are spaced a short distance apart. Endless cross-conveyor chains 29 and 30 are disposed parallel to the outer edges of said rolls and are arranged to travel in a direction at right angle to said apron. Projections II and 32 are provided at intervals on the chains 29 and 20 for the purpose of engaging one edge of each box blank to inject said blanks into the receiving end of a box gluing and folding machine A which is shown placed at right angles to the rear end portions of the frame members 9.

The box folding and gluing machine shown at A in Figure 1 is similar to the one shown and described in my Patent #1,104,013, and its spethe outer end of the brush 49.

cific construction therefore forms no part of the present invention.

With a positioning mechanism similar to that shown in the above mentioned patent, it was found that the rear end of the box blank would,

settle comparatively slowly into the path of the projections 3| on the cross-chain 29, due to its light weight, and this fact necessitated running the machine at a lower rate of speed than was required .by the other operations performed in the same machine. Now, in order to make the positioning mechanism perform in a more positive and rapid manner, I provide a cam shaft 33 directly above the cross-conveyor chain 29, and this cam shaft revolves in hearings in the lower end of bearing blocks 34 and 35 which are adjustably mounted on auxiliary frame members 39 and 31. The cam shaft 33 is driven by a chain 38 at a speed coinciding with the spaces between each-pair of projections 3| and 32 on the'conveyor chains 29 and 30. As shown in adjustable cams 39 on the shaft 33, and each cam has an eccentric periphery 40 on one side thereof which termi- H on its other side. The rotation of the shaft 33, and the radial position of the'cams 39 thereon, are synchronized with the blank cutting rolls and the special delivery device, so that at each revolution of said shaft,

the forward edge of a box blank will pass directly.

under the smaller radius of the cam surface 40, as shown in Figure 5, while the progressive movement of both blan and cams will cause the cam surface 40 to gradually depress the blank, as shown in Figure 6, until the largest radius of said cam surface will press the rear end of the blank into near contact with the cross-chain 29 just before the projections 3| and 32 engage the edge of the blank Ill.

A transversely arranged bar 4| is adjustably secured by bolts to brackets 43 which, in turn,

azcasoa brush 49, directly above the positioned box blank to help guide said blank into place and to preis driven by a belt 50 5| on the driven cam which passes over a pulley shaft 33 to a pulley 52 on The conveyor apron 26 is driven by a pulley 53 on a liveshaft 54, and passes around an idler roll 55 upwardly to the idler rolls 2! and 28, and thencedownwardly to another idler roll 56 from which it travels over an adjustable tensioning roll 51, back to the pulley 53. The idler rolls 21 and 55, and 28 and 56 are adapted to be wise of the machine to be set for boxes of various sizes, while the special delivery belts |5l 5 and l6-I6, and the cams 39 may be adjusted crosswise .of the machine for boxes of From the above description of my invention it will be apparent that I have devised an improved mechanismby which the objects of my invention have been attained, and the new features and constructions of same are specified in the following claims.

I claim:

1. In a paper box machine, means for sep'arating the box blanks and projecting said blanks at fixed intervals into arrested'position above a transversely moving conveyor, spaced vertical projections provided on said conveyor, and timed rotary means including cam shaped members for progressively depressing the rear of the arrested blankinto the path of said projections, for the purpose specified. I

2. In a paper box machine, means for separating the box blanks and projecting said blanks at equal intervals into arrested position above a transversely moving conveyor, stationary means for locating the fore part of said blank in place immediately above said conveyor, timed rotary means including cam shaped members for progressively forcing the rear part of saidblank into place above said conveyor, and spaced vertical projections on said conveyor to engage the positioned blank at timed intervals, for the purpose specified.

3. In a paper box machine, a box blank carrier terminating in an adjustable delivery device adapted to project the spaced box blanks at fixed intervals into arrested position above a transversely moving conveyor, stationary means I adjustably arranged for' locating the fore part of said blank in place immediately above said conveyor, rotating cam members for progressively depressing the rear part of said blank into position above said conveyor, and spaced vertical projections on said conveyor to engage the positioned blank at timed intervals, for the purpose specifled.

4. In a paper box machine, a box blank carrier terminating in a vertically adjustable delivery device adapted to project each .blank at a selected downward angle onto a horizontal conveyor apron moving in the same direction, transversely moving conveyor belts arranged near the front and rear ends of said apron, stationary means for locating thefore part of said blanks in place immediately above-one of said conveyor belts, rotating cam' members for progressively depressing the rear part of said blanks into place above the other of vertical projections provided at spaced intervals on said conveyor belts, and each pair of said projections arranged to simultaneously enmoved lengthvarious widths.

conveyor belt, a pair gage the edge of the positioned blank, for the P rp specified.

5.Intheprimaryunitofaboxmaking ma-. chine adapted to take stock from a roll and provided with cutting and creasing members, a box blank carrier adapted to project each blank separately at increased speed onto a transversely moving conveyor, means for guiding the fore part of the box blank into arrested position immediately above the conveyor, means including a cam shaped member for progressively forcing the rear part of said box blank into position immediately above said conveyor, and spaced vertical projections on said conveyor and timed to engage an edge of the positioned blank to move said blank laterally into a secondary unit of said box making machine.

6. In the primary unit of a box making machine, a box blank carrier adapted to project each blank separately with increased velocity blanks, means for receiving said blanks, timed against a stop beyond a transversely moving conveyor, means for guiding the fore part of the blank into arrested position immediately above the conveyor, rotating means for progressively forcing the rear part of said blank into position immediately above said conveyor, means arranged above said conveyor to prevent upward bulging of the middle portion of the positioned blank, and spaced vertical projections on said conveyor and timed to engage the edge of the 0 positioned blank to move said blank laterally into a secondary unit of said box making machine.

7. In a paper box machine, a box blank carrier terminating in a delivery device adapted to project each separate blank at a slight downward angle onto a conveyor apron moving in the same direction, transversely moving conveyor belts arranged at the front and rear ends of said apron and provided with vertically projecting lugs at 0 equally spaced intervals, stationary means for locating the forward part of the projected blank in arrested position aboveone of the conveyor belts, a series of eccentric cams adjustably secured on a rotating shaft and adapted to progremively depress the rear part of the projected blank on its way into position above the other conveyor belt, means engagin the top of the projected blank to prevent upward bulging of the middle portion of said blank, and projecting lugs on the conveyor belts timed to simultaneously one edge'of the positioned blank to move it transversely of the machine, for the purpose described.

8. In combination, a-primary unit of a paper box machineadaptedto takestockfromaroll and provided with blank cutting and creasing means comprising a longitudinal box blank carrier and a transverse conveyor, means for proiectlng each succeeding blank from said carrier over-"against a stop device immediately beyond said transverse conveyor, means for positioning the fore part of the projected -blank slightly above said conveyor, rotating means including cam shaped members for progressively depress- 5 ingtherearpartofsaidmojectedblanktoapoint near said conveyor, and vertical projections on said conveyor timed to engage one edge of the positioned blank to move said blank laterally into a secondary unit of said machine.

9. A machine for forming paper articles, in-

cluding a right angle transfer section for said articles, comprising a first conveyor for transporting said articles in a first direction, a second conveyor having carrier lugs for transporting said articles in a right angle direction from said first conveyor, a revolving shaft located with its axis parallel to the direction of travel of said means located above the moving blanks and traveling in the direction of said blanks and adapted to act only on the rear of each blank, as said blanks leave said separating means, thereby to deflect the rear portion of each blank from the path of the blank immediately following.

11. In a paper box making machine, means for separating the box blanks and projecting said blanks at equal intervals into arrested position above a rapidly moving conveyer, stationary means for locating the fore part of each blank in place immediately above the conveyer,

cam shaped members operating in timed relation to the traveling movement of the blanks for progressively forcing the rear part of each blank into place above said conveyer, and spaced projections on said conveyer for engaging the positioned blanks for the purpose specified.

12. In a paper box making machine, means for separating the box blanks and projecting said blanks at equal intervals into arrested position above a moving conveyer, stationary means for guiding the leading end portion of each blank into place immediately above the conveyer, and cam shaped members operating in timed relation to the traveling movement of the blanks for progressively forcingthe trailing end portion of .each blank outcof the pathof the next following blank and into place on said conveyer, whereby the blanks may be fed onto said conveyer in rapid succession.

13. In a paper box making machine adapted to receive stock from a roll, means for cutting blanks from said roll, means for separating the blanks. a conveyer for receiving said blanks, and

a member mounted for rotary movement above the path of travel of the blanks and having a ating the machine at high speeds.

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